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變(bian)(bian)風(feng)量空(kong)調系(xi)統(tong)（VAV）是(shi)全空(kong)氣系(xi)統(tong)的一種(zhong)形式，其工作原理是(shi)在各(ge)房(fang)間(jian)(jian)設置(zhi)變(bian)(bian)風(feng)量裝(zhuang)(zhuang)置(zhi)，當空(kong)調房(fang)間(jian)(jian)符合變(bian)(bian)化時變(bian)(bian)風(feng)量裝(zhuang)(zhuang)置(zhi)改變(bian)(bian)送入(ru)房(fang)間(jian)(jian)的風(feng)量來滿足室內負(fu)荷變(bian)(bian)化，保(bao)證房(fang)間(jian)(jian)溫度(du)穩(wen)定在設定值；同(tong)時，系(xi)統(tong)根(gen)據(ju)各(ge)個變(bian)(bian)風(feng)量裝(zhuang)(zhuang)置(zhi)的風(feng)量變(bian)(bian)化，變(bian)(bian)頻(pin)(pin)調節空(kong)調機組(zu)送風(feng)頻(pin)(pin)率，改變(bian)(bian)系(xi)統(tong)的總(zong)送風(feng)量，滿足系(xi)統(tong)空(kong)調負(fu)荷變(bian)(bian)化的需求，達(da)到節能(neng)的目的。